CGC Maintenance Mode plugin allows you to put your site into maintenance mode, by allowing only users with specified IP addresses to view the site.
Easily put your site into maintenance mode with this plugin so that you can perform updates. The plugin works by taking a selection of IP addresses and comparing them to the visitor’s IP address.
Users whose IP addresses match those specified in the settings page can view the site normally. Users who do not have IP access are directed either you a WordPress page (which you pick), or to any external url.
To use the plugin:
upload the plugin
activate the plugin
go to the “Maintenance Mode” settings
check the “Enable Box”
enter the IP addresses that should have access
choose whether to redirect non-authorized users to a page or url
choose the page or enter the url
Download: http://wordpress.org/extend/plugins/cgc-maintenance-mode/
